Japan Flora: Culms 30-50 cm. long, acutely angled, smooth; leaves 2.5-4 mm. wide, nearly smooth, glabrous, gradually narrowed and obtuse at apex, the sheaths wingless; partial inflorescences 2-3, erect, 1.5-3 cm. long, the branches smooth; spikelets 4-5 mm. long; achenes white, tawny at maturity, nearly globose, about 2 mm. across, glabrous, lustrous in the hollows, dull on the raised reticulations; hypogynium 3-lobed, the lobes flat, ovate, abruptly narrowed and acute, abruptly thin-margined. July-Oct. Wet places in lowlands.

Honshu (Kadzusa, Mi- kawa, Ogami, and Tamba Prov.) Kyushu; rare. Africa, India, and Malaysia.